CVE-2026-98512

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-98512", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-25T10:25:14.354Z", "datePublished": "2026-10-18T15:17:27.102Z", "dateUpdated": "2026-10-24T14:09:12.662Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-24T14:09:12.662Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/nouveau: RCU-free the scheduler-containing nouveau_sched\n\nstruct nouveau_sched embeds a struct drm_gpu_scheduler (base).\nnouveau_sched_destroy() calls nouveau_sched_fini() (which does\ndrm_sched_fini(&sched->base)) and then frees the object with plain\nkfree(sched).\n\ndrm_sched_fence_get_timeline_name() returns fence->sched->name, and the\nscheduler fence keeps a .release callback so it is not ops-detached on\nsignalling. A finished fence exported to userspace via drm_syncobj /\nsync_file therefore keeps pointing at &sched->base after nouveau_sched_destroy(),\nand a later get_timeline_name() -- reachable unprivileged through\nSYNC_IOC_FILE_INFO -- dereferences freed memory (KASAN slab-use-after-free\nread).\n\nPer the dma-fence lifetime contract the exporter must keep the data backing a\nsignalled fence alive for an RCU grace period. Free the scheduler-containing\nobject with kfree_rcu() instead of kfree()."}], "metrics": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H", "baseScore": 7.1, "baseSeverity": "HIGH"}, "scenarios": [{"lang": "en", "value": "AV:L - A local process reaches the patched nouveau_sched_destroy() through DRM-fd close or DRM_IOCTL_NOUVEAU_CHANNEL_FREE, then triggers the dangling scheduler access through SYNC_IOC_FILE_INFO \u2192 sync_fill_fence_info() \u2192 drm_sched_fence_get_timeline_name(); no network path exists.\nAC:L - The attacker controls fence creation, export, scheduler teardown, and querying; affected branches permit a post-teardown query, and where concurrent timing is needed the attacker can gate its job on a syncobj and repeatedly race its completion and close against SYNC_IOC_FILE_INFO.\nPR:L - NOUVEAU_VM_INIT, VM_BIND, EXEC, CHANNEL_FREE, and the core syncobj ioctls are DRM_RENDER_ALLOW, while drm_ioctl_permit() imposes no DRM_MASTER, DRM_ROOT_ONLY, or capability check; ordinary render-node access suffices.\nUI:N - The attacker independently creates and exports the scheduler fence, closes the channel or DRM file to invoke nouveau_sched_destroy(), and queries the retained sync-file without any victim action.\nS:U - The freed nouveau_sched and the resulting disclosure or crash are within the same host-kernel security authority; the path does not cross a VM, IOMMU, or hypervisor boundary.\nC:H - drm_sched_fence_get_timeline_name() treats reclaimed nouveau_sched bytes as the name pointer; after heap reuse, sync_fill_fence_info() copies up to 31 bytes from that attacker-influenced address into user-visible obj_name, and repeated objects support arbitrary kernel-memory disclosure.\nI:N - The stale value is used only as the source pointer for strscpy() into a correctly sized, newly allocated sync_fence_info buffer; this path never writes through fence->sched or the attacker-influenced pointer, so it provides no demonstrated modification primitive.\nA:H - If reclaimed sched->name contains an invalid address, strscpy() in sync_fill_fence_info() can cause a kernel page fault and oops or panic; KASAN directly detects the slab use-after-free, and the local sequence is repeatable."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/gpu/drm/nouveau/nouveau_sched.c", "drivers/gpu/drm/nouveau/nouveau_sched.h"], "versions": [{"version": "5f03a507b29e44a848f315c7240c19894dd8be4f", "lessThan": "40edf5eefc3fd94592a91d6eb074d4fc6f606c75", "status": "affected", "versionType": "git"}, {"version": "5f03a507b29e44a848f315c7240c19894dd8be4f", "lessThan": "35151e9a8274174ccbb92e3b3ba7dc7a008dcada", "status": "affected", "versionType": "git"}, {"version": "5f03a507b29e44a848f315c7240c19894dd8be4f", "lessThan": "cd6e11b6ebe04a0a1f1435df561acada9eadc563", "status": "affected", "versionType": "git"}, {"version": "5f03a507b29e44a848f315c7240c19894dd8be4f", "lessThan": "f7eae6d8d768fabd6b59779ca7da79e02c74e113", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/gpu/drm/nouveau/nouveau_sched.c", "drivers/gpu/drm/nouveau/nouveau_sched.h"], "versions": [{"version": "6.8", "status": "affected"}, {"version": "0", "lessThan": "6.8", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.112", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.55", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2.9", "lessThanOrEqual": "7.2.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.3", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.8", "versionEndExcluding": "6.12.112"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.8", "versionEndExcluding": "6.18.55"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.8", "versionEndExcluding": "7.2.9"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.8", "versionEndExcluding": "7.3"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/40edf5eefc3fd94592a91d6eb074d4fc6f606c75"}, {"url": "https://git.kernel.org/stable/c/35151e9a8274174ccbb92e3b3ba7dc7a008dcada"}, {"url": "https://git.kernel.org/stable/c/cd6e11b6ebe04a0a1f1435df561acada9eadc563"}, {"url": "https://git.kernel.org/stable/c/f7eae6d8d768fabd6b59779ca7da79e02c74e113"}], "title": "drm/nouveau: RCU-free the scheduler-containing nouveau_sched", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["drivers/gpu/drm/nouveau/nouveau_sched.c", "drivers/gpu/drm/nouveau/nouveau_sched.h"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "40edf5eefc3fd94592a91d6eb074d4fc6f606c75", "status": "affected", "version": "5f03a507b29e44a848f315c7240c19894dd8be4f", "versionType": "git"}, {"lessThan": "35151e9a8274174ccbb92e3b3ba7dc7a008dcada", "status": "affected", "version": "5f03a507b29e44a848f315c7240c19894dd8be4f", "versionType": "git"}, {"lessThan": "cd6e11b6ebe04a0a1f1435df561acada9eadc563", "status": "affected", "version": "5f03a507b29e44a848f315c7240c19894dd8be4f", "versionType": "git"}, {"lessThan": "f7eae6d8d768fabd6b59779ca7da79e02c74e113", "status": "affected", "version": "5f03a507b29e44a848f315c7240c19894dd8be4f", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["drivers/gpu/drm/nouveau/nouveau_sched.c", "drivers/gpu/drm/nouveau/nouveau_sched.h"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "6.8"}, {"lessThan": "6.8", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.112", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.55", "versionType": "semver"}, {"lessThanOrEqual": "7.2.*", "status": "unaffected", "version": "7.2.9", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.3", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/nouveau: RCU-free the scheduler-containing nouveau_sched\n\nstruct nouveau_sched embeds a struct drm_gpu_scheduler (base).\nnouveau_sched_destroy() calls nouveau_sched_fini() (which does\ndrm_sched_fini(&sched->base)) and then frees the object with plain\nkfree(sched).\n\ndrm_sched_fence_get_timeline_name() returns fence->sched->name, and the\nscheduler fence keeps a .release callback so it is not ops-detached on\nsignalling. A finished fence exported to userspace via drm_syncobj /\nsync_file therefore keeps pointing at &sched->base after nouveau_sched_destroy(),\nand a later get_timeline_name() -- reachable unprivileged through\nSYNC_IOC_FILE_INFO -- dereferences freed memory (KASAN slab-use-after-free\nread).\n\nPer the dma-fence lifetime contract the exporter must keep the data backing a\nsignalled fence alive for an RCU grace period. Free the scheduler-containing\nobject with kfree_rcu() instead of kfree()."}], "id": "CVE-2026-98512", "lastModified": "2026-10-24T14:16:45.290", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.1, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.2, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}]}, "published": "2026-10-18T16:17:02.457", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/35151e9a8274174ccbb92e3b3ba7dc7a008dcada"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/40edf5eefc3fd94592a91d6eb074d4fc6f606c75"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/cd6e11b6ebe04a0a1f1435df561acada9eadc563"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/f7eae6d8d768fabd6b59779ca7da79e02c74e113"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: drm/nouveau: RCU-free the scheduler-containing nouveau_sched", "id": "2554846", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2554846"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-825", "details": ["In the Linux kernel, the following vulnerability has been resolved:\ndrm/nouveau: RCU-free the scheduler-containing nouveau_sched\nstruct nouveau_sched embeds a struct drm_gpu_scheduler (base).\nnouveau_sched_destroy() calls nouveau_sched_fini() (which does\ndrm_sched_fini(&sched->base)) and then frees the object with plain\nkfree(sched).\ndrm_sched_fence_get_timeline_name() returns fence->sched->name, and the\nscheduler fence keeps a .release callback so it is not ops-detached on\nsignalling. A finished fence exported to userspace via drm_syncobj /\nsync_file therefore keeps pointing at &sched->base after nouveau_sched_destroy(),\nand a later get_timeline_name() -- reachable unprivileged through\nSYNC_IOC_FILE_INFO -- dereferences freed memory (KASAN slab-use-after-free\nread).\nPer the dma-fence lifetime contract the exporter must keep the data backing a\nsignalled fence alive for an RCU grace period. Free the scheduler-containing\nobject with kfree_rcu() instead of kfree().", "A flaw was found in the Linux kernel's Nouveau graphics driver. When destroying a GPU scheduler object, the driver frees memory prematurely while user-space synchronization objects still hold references to it. A local, unprivileged user could exploit this flaw by querying synchronization file information to trigger a use-after-free read, potentially leading to a system crash and Denial of Service (DoS) or information disclosure."], "name": "CVE-2026-98512", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Not affected", "package_name": "openshift/ose-rhel-coreos-8", "product_name": "Red Hat OpenShift Container Platform 4"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Fix deferred", "package_name": "openshift/ose-rhel-coreos-9", "product_name": "Red Hat OpenShift Container Platform 4"}], "public_date": "2026-10-18T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-98512\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-98512\nhttps://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-98512.mbox"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[5f03a507b29e44a848f315c7240c19894dd8be4f,40edf5eefc3fd94592a91d6eb074d4fc6f606c75)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[5f03a507b29e44a848f315c7240c19894dd8be4f,35151e9a8274174ccbb92e3b3ba7dc7a008dcada)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[5f03a507b29e44a848f315c7240c19894dd8be4f,cd6e11b6ebe04a0a1f1435df561acada9eadc563)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[5f03a507b29e44a848f315c7240c19894dd8be4f,f7eae6d8d768fabd6b59779ca7da79e02c74e113)"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "6.8"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,6.8)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.112,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.55,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.2.9,7.3.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.3-rc5,*]"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}], "created": "2026-10-19T00:15:14.332071+00:00", "updated": "2026-10-24T16:00:18.159149+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"], "weaknesses": ["CWE-416", "CWE-825"]}